From e9de3816070323a105bb69809fd1ab0012fda9b5 Mon Sep 17 00:00:00 2001
From: Itamar <itamar8910@gmail.com>
Date: Sat, 5 Mar 2022 16:11:03 +0200
Subject: [PATCH] LibCpp: Don't include parameter type in
 FunctionType::to_string if null

The type of a function parameter can be null if we failed to parse it.
In such a case, calling to_string() on a FunctionType node used to cause
a null dereference.

This caused the language server to crash when processing
AK/StdLibExtraDetails.h
---
 Userland/Libraries/LibCpp/AST.cpp | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/Userland/Libraries/LibCpp/AST.cpp b/Userland/Libraries/LibCpp/AST.cpp
index 30087afd09..f07e09d252 100644
--- a/Userland/Libraries/LibCpp/AST.cpp
+++ b/Userland/Libraries/LibCpp/AST.cpp
@@ -124,7 +124,8 @@ String FunctionType::to_string() const
             first = false;
         else
             builder.append(", ");
-        builder.append(parameter.type()->to_string());
+        if (parameter.type())
+            builder.append(parameter.type()->to_string());
         if (parameter.name() && !parameter.full_name().is_empty()) {
             builder.append(" ");
             builder.append(parameter.full_name());